摘要
研究目的:以邻近宽大深基坑的拱形构筑物的变形控制为目的,通过地层结构模型与荷载结构模型的计算分析,针对邻近拱形构筑物选择合理的保护措施和深基坑支护体系。研究结论:通过监测资料表明,针对航站楼斜拱桩基础的位移控制取得较为明显的效果,深基坑工程也处于安全稳定状态,从而验证了设计的合理性与安全性。针对邻近构筑物的保护措施中,地基加固能有效减小土体的压缩变形,对控制构筑物变形效果显著,隔离桩能适当降低水平推力向基坑支护体系的传递,对控制基坑变形具有明显的作用。基坑施工过程中建立全面、严密的监测体系是完全必要的,通过及时的监测信息反馈指导施工,不仅保证了基坑自身的安全稳定,还可对周边环境影响进行有效控制,减少施工对航站楼斜拱基础等周围环境的影响。
Research purposes： The calculation and analysis were made with the stratum structure model and load structure model to control the deformation of arched structure near the large deep foundation pit, and the rational protection measures and the support system were chosen for the deep foundation pit near the arched structure. Research conclusions： The monitoring data showed that by control of the displacement of the inclined arched pile foundation of the terminal, the good effect achieved to make the deep foundation pit engineering in safe and stable state. It proved the rationality and stability of the design. For the nearby structure, the compressed deformation of the soil could be redeuced by reinforcing the foundation to achieve the obvious effect of controlling the deformation of the structure, and the transmission of the horizontal thrust into the support system for foundation pit could be cut by the insulation pile to get the good control effect of the deformation of the foundation pit. It was necessary to establish the comprehensive and rigorous monitoring system during construction so that the monitored data could be feedback to direct the construction. It not only guaranteed the safety and stability of the foundation pit, but also controlled the influence on the nearby environment and reduced the influence of the construction on the environment around the inclined arched foundation of the terminal.
出处
《铁道工程学报》
EI
北大核心
2012年第10期90-94,共5页
Journal of Railway Engineering Society
关键词
变形控制
水平推力
宽大深基坑
deformation control
horizontal thrust
large deep foundation pit
